Air heater



Oct. 23, 1928, 1,689,067

L. A. BENNER AIR HEATER Filed May 24. 1926 2 Sheets-Sheet l INVKXYOW.

& 00/5 A. BEA/NEH,

B:M e-W Oct. 23, 1928. 1,689,067

' L. A. BENNER AIR HEATER Filed May 1926 I 2 Sheets-Sheet 2 luvs/Wok;-

A 0015 A. fiEN/VER,

by the heating body.

Patented Oct. 23, 1928.

UNITED STATES PATENT OFFICE.

LOUIS A. ms, or mannm, cnuroama.

m nna'rim.

Application filed Ma 24,1926. Serial No. 111,304.

This invention relates to devicesused for household heating purposes byWhlCh air 1s heated through heating bodies or elements.

One of the objects of this invention s to "3 provide .a simple furnaceby wh ch air is carried through a heating body in such a manner as toassure an efficient heatlng of the air and so as to avoid or eliminateanundesired checking or choking of the air Another object is to providea heatmg body through which the air as well as the heat passes in anupward and lncllned direction.

Another object is to provide a dev ce by which the heat, as products ofcombustion, is surrounded by the air holding chambers and passages.

Other objects will appear from the following description and appendedolalm as well as from the accompanying drawing, in which w v Fig. 1 is avertical midsectlonal view or a furnace of a simple form, with anair-heat- 5 ingbody designed 1n agreement with this invention. I

Fig. 2 is a fragmentary cross sect on through the heating body 01 Fig.1, on hne 2-2.

Fig. 3 is a horizontal cross section on line 3-3 of Fig. 1.

Fig. 4 is a through a preferred form of heating bodies or elements,sliglhtly modified over. the form .of the heating ody in Fig. 1.

Fig. 5 is a fragmentary cross section of another slightly modified formof heating body, similar to the preferred form of Fig. 4.

When an air furnace of this type is overheated there is the possibilityt at air will not pass through or into such a furnace, and, on the otherhand, when only little heat is applied or used, heat may be used inpoorly designed furnaces up to excessive amounts. As illustrated, theapparatus may be divided principally into the central heating body 6 andthe surrounding body 7 the lower portion of the heating bod sultableheating meansare provided, pre erably at or near the point indicated at8, in form of burners for gaseous or liquid fuel or in form of a gratefor burning more solid fuel as wood or coal.

The baflles 9 and 10 serve to spread the products of combustion, toevenly pass through the proportionally small and nar- .the outlet orstack 17 is fragmentary cross section row passages of the radiator andin the indirection of the arrows 11, 12, 13, and 14. While the lowercombustion chamber 15, and the housin 16 of the radiator are of acomparatlvely large and rectangular form, preferably proportionallysmall and narrow.

The radiator embodies a system of comparatlvely large passages for air,as indicated at 18 in Figs. 2, 4, and 5, and other passages for theproducts of combustion indicated by the arrows 19, whereby it is notvery material whether tubular members 20 are used or the preferred formsof Figs. 4 and 5.

In a general way it may be considered that the various forms of heatingelements as illustrated in Figs. 1, 2, 4 and 5, are equally wellmanufactured and assembled, but upon more careful consideration, keepmg1n mind that the air passages are comparatively large, and that theheating elements are preferably made of thin sheet metal, such heatingelements if made in tubular form require a seam for each tube, while inthe preferred forms of Figs. 4 and 5 a sheet of material may be bent toinclude several large passages in the finished form by having only oneseam at one end or a seam at each end as indicated at 21. No seams havebeen shown or indicated in Fig. 2, but there are naturally seams in thetubes if made of sheet metal.

The ends of the heating elements, whether made in tubular form asillustrated in Fig. 2,

or corrugated form as illustrated in Figs. 4 and 5, are secured in theend plates 16 of the central housing, while similar spaces or spacing isprovided between the side walls 16,, of the housing on the one side andthe heating elements on the other sides, and also between the severalheating elements, in order to assurean even distributing of the productsof combustion around the heating elements.

The products of combustion pass from the lower combustion chamber. 15upwardly around and over the heating elements and between the end walls16 and side walls 16,, on rising further, being deflected by the baflles'22 and 23, to finally escape through the outher 28 is formed within theouter housing 7 in its upper part, whereby the heated air is accumulatedto be discharged in an even stream throu h the several discharges 29.

The space Eetween the central body 6, including the radiator and theouter housing 7 is maintained so narrow that air is evenly dischargedthrough the heating elements and the spaces around therccntral body,such narrow spaces between the two main bodies being indicated at 30 inFig. 3.

Having thus described my invention, I claim:

In an air-heater, a housing having an air inlet connection near thebottom at one side and air outlet connections in and near the top nearthe opposite side of the housing, and a radiator having a combustionchamber substantially in a vertical position and having an inclinedportion continuing from the combustion chamber upwardly and transverselyacross the path from the inlet to the outlet comiections in the saidhousing, the radiator being provided with air conduits in the saidinclined portion transversely to the inclined portion and substantiallyin the direction of the path from the said inlet to the outletconnections and the outside of the radiator being laterally spaced fromthe inside of the said housing forming comparatively narrow additionalair passages between the said inlet and outlet connections, the radiatorhaving an extension end substantially in a vertical position above theinclined portion adapted to'collect and condense the products ofcombustion after passing around the said air conduits and having acomparatively small outlet in one side near the top, the said radiatorhaving a discharge pipe continuing from the said comparatively smalloutlet in the extension end and extending downwardly within the saidhousing passing through the rearside of the housing for dischargingproducts of combustion from the radiator.

In testimony that I claim the foregoing as my invention I have signed myname.

LOUIS A. BEN N ER.

